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TesUAmerica <br />' ANALYTICAL TESTING CORPORATION <br /> 2960 F057$R GREIGH7DN DRIVE • NASHVILLE TENNESSEE 37204 <br /> 800-765-0980 • 615-726-3404 FAX <br /> tROJECT QUALITY CONTROL DATA <br /> Project Number: <br />�zoject Name: EXXONMOBIL 7-3942 <br /> age: 1 <br /> Laboratory Receipt Date: 10/ 1/04 <br />' Matrix Spike Recovery <br /> Note If Blank is referenced as the sample spiked, insufficient volume was received for the defined analytical batch for <br /> MS/MSD analysis on an true sample matrix Laboratory reagent water was used for QC purposes <br />' Analyte units Orag Val MS Val Spike Conc RecoveryTar Q C Batch Spike Sample <br /> ----- g g et Range- ---------- -p-------P-- <br />' .*UST ANALYSIS" <br /> Benzene mg/l D 0089D 0 0654 0 0500 113 50 - 160 7002 04-AlS1752 <br /> Toluene mg/l 0 0113 0 07DB 0 0500 119 51 - 157 7002 04-A151752 <br />' Ethylbenzene mg/l 0 0067 0 0626 0 0500 112 47 - 159 7002 04-AIS1752 <br /> Xylenes (Total) mg/l 0 0156 0 125 0 IOD 109 51 - 152 7002 04-AIS1752 <br /> Methyl-t-butylether mg/l D 0094 0 0631 0 D500 107 36 - 159 7002 D4-A151752 <br /> TPH (Gasoline Range) mg/1 1 90 1 83 1 00 133 43 - 150 70D2 04-AlSI752 <br /> BTEX/GRO Surr , a,a,a-TFT % Recovery 111 70 - 123 7002 <br /> VOA Surr 1,2-DCA-d4 4: Rec 112 73 127 300 <br /> VOA Surr 1,2-DCA-d4 1, Rec 91 73 - 127 2447 <br /> I VOA Surr 1,2-DCA-d4 k Rec 84 73 - 127 2385 <br /> VOA Surr 1,2-DCA-d4 Rec 94 73 - 127 482D <br /> VOA Surr Toluene-118 3 Rec 100 79 - 113 30D <br /> VOA Surr Toluene-d8 $ Rec 89 79 - 113 2447 <br /> VOA Surr Toluene-de Rec 100 79 - 113 2385 <br /> VOA Surr Toluene-d8 8 Rec 9D 79 - 113 4820 <br /> VOA Surr, 4-BFB % Rec 98 79 - 125 300 <br /> VOA Surr, 4-BFB * Rec 97 79 - 125 2447 <br /> VOA Surr, 4-BFB t Rec 99 79 - 125 2385 <br /> VOA Surr, 4-BFB I Rec 95 79 - 125 4820 <br /> VOA Surr, DBFM 4 Rec 97 75 - 134 300 <br /> VOA Surr, DBFM % Rec 94 75 - I34 2447 <br /> VOA Surr, DBFM % Rec 92 75 - 134 2385 <br /> VOA Surr DBFM % Rec 104 75 - 134 4820 <br /> project QC continued <br />' www testamerlcalnc com <br /> TestAmerlco Analytical Testing Corporotlon I TestAmenco Drilling Corporation I TestAmenca Air Emission Corporation <br />